package com.lqk.netty.codec2;

import com.lqk.netty.codec.StudentPOJO;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.util.Random;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    /*
        当通道就绪就会触发该方法
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // 随机的发送 Student 或者 Worker 对象
        int random = new Random().nextInt(3);
        MyDataInfo.MyMessage myMessage=null;

        if (0==random){ // 发送 Student 对象
            myMessage = MyDataInfo.MyMessage.newBuilder()
                    .setDataType(MyDataInfo.MyMessage.DataType.StudentType)
                    .setStudent(MyDataInfo.Student.newBuilder()
                            .setName("玉麒麟 卢俊义").setId(5)
                            .build()
                    ).build();
        }else { //发送一个 Worker 对象
            myMessage = MyDataInfo.MyMessage.newBuilder()
                    .setDataType(MyDataInfo.MyMessage.DataType.WorkerType)
                    .setWorker(MyDataInfo.Worker.newBuilder()
                            .setName("老李").setAge(20)
                            .build()
                    ).build();
        }

        ctx.writeAndFlush(myMessage);
    }

    /*
        当通道有读取事件时，会触发
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器回复的消息：" + buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址：" + ctx.channel().remoteAddress());
    }

    /*
        数据读取完毕的处理
     */
    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        System.err.println("客户端读取数据完毕");
    }

    /*
        异常发生
     */
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.channel().close();
    }
}
